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// Copyright 2018 The dexon-consensus Authors
// This file is part of the dexon-consensus library.
//
// The dexon-consensus library is free software: you can redistribute it
// and/or modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// The dexon-consensus library is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
// General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the dexon-consensus library. If not, see
// <http://www.gnu.org/licenses/>.
package types
import (
"fmt"
"github.com/tangerine-network/tangerine-consensus/common"
"github.com/tangerine-network/tangerine-consensus/core/crypto"
cryptoDKG "github.com/tangerine-network/tangerine-consensus/core/crypto/dkg"
)
// VoteType is the type of vote.
type VoteType byte
// VoteType enum.
const (
VoteInit VoteType = iota
VotePreCom
VoteCom
VoteFast
VoteFastCom
// Do not add any type below MaxVoteType.
MaxVoteType
)
// NullBlockHash is the blockHash for ⊥ value.
var NullBlockHash common.Hash
// SkipBlockHash is the blockHash for SKIP value.
var SkipBlockHash common.Hash
func init() {
for idx := range SkipBlockHash {
SkipBlockHash[idx] = 0xff
}
}
// VoteHeader is the header for vote, which can be used as map keys.
type VoteHeader struct {
ProposerID NodeID `json:"proposer_id"`
Type VoteType `json:"type"`
BlockHash common.Hash `json:"block_hash"`
Period uint64 `json:"period"`
Position Position `json:"position"`
}
// Vote is the vote structure defined in Crypto Shuffle Algorithm.
type Vote struct {
VoteHeader `json:"header"`
PartialSignature cryptoDKG.PartialSignature `json:"partial_signature"`
Signature crypto.Signature `json:"signature"`
}
func (v *Vote) String() string {
return fmt.Sprintf("Vote{VP:%s %s Period:%d Type:%d Hash:%s}",
v.ProposerID.String()[:6],
v.Position, v.Period, v.Type, v.BlockHash.String()[:6])
}
// NewVote constructs a Vote instance with header fields.
func NewVote(t VoteType, hash common.Hash, period uint64) *Vote {
return &Vote{
VoteHeader: VoteHeader{
Type: t,
BlockHash: hash,
Period: period,
}}
}
// Clone returns a deep copy of a vote.
func (v *Vote) Clone() *Vote {
return &Vote{
VoteHeader: VoteHeader{
ProposerID: v.ProposerID,
Type: v.Type,
BlockHash: v.BlockHash,
Period: v.Period,
Position: v.Position,
},
PartialSignature: cryptoDKG.PartialSignature(
crypto.Signature(v.PartialSignature).Clone()),
Signature: v.Signature.Clone(),
}
}
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